92 lines
3.0 KiB
C#
92 lines
3.0 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Dynamic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using AutoMapper;
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namespace Server.Utils
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{
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/// <summary>
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/// 动态属性
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <typeparam name="TDestination"></typeparam>
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public class DynamicCustomResolver<TSource, TDestination, TMember> : IValueResolver<TSource, TDestination, TMember>
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{
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public DynamicCustomResolver(string name, Func<object, TMember> resolverValueFunc)
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{
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Name = name;
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this.MemberType = typeof(TDestination).GetProperty(name).PropertyType;
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this.ResolverValueFunc = resolverValueFunc;
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}
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/// <summary>
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/// 属性的名称
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/// </summary>
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public string Name { get; set; }
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/// <summary>
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/// 成员类型
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/// </summary>
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public Type MemberType { get; set; }
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/// <summary>
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/// 自定义转换值
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/// </summary>
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public Func<object, TMember> ResolverValueFunc { get; set; }
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/// <summary>
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/// 转换
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/// </summary>
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/// <param name="source"></param>
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/// <param name="destination"></param>
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/// <param name="destMember"></param>
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/// <param name="context"></param>
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/// <returns></returns>
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public TMember Resolve(TSource source, TDestination destination, TMember destMember, ResolutionContext context)
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{
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try
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{
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var dny = source as ExpandoObject;
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var item = dny.FirstOrDefault(w => w.Key == Name);
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var val = item.Value;
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//如果自定义了转换器，就调用
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if (ResolverValueFunc != null)
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{
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return ResolverValueFunc(val);
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}
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if (item.Value == DBNull.Value)
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{
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val = null;
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}
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if (this.MemberType.IsEnum)//枚举
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{
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if (val == null)
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{
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return (TMember)Enum.ToObject(this.MemberType, 0);
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}
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return (TMember)Enum.ToObject(this.MemberType, val);
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}
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if (this.MemberType == typeof(string))
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{
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if (val == null)
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{
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return default(TMember);
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}
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return (TMember)Convert.ChangeType(val, this.MemberType);
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}
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if (this.MemberType.IsValueType)
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{
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if (val == null)
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{
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return default(TMember);
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}
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}
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return (TMember)Convert.ChangeType(val, this.MemberType);
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}
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catch (Exception e)
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{
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throw new Exception(this.Name + "转换错误 " + source, e);
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}
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}
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}
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}
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